Rokr Locomotive Mechanical Wooden Gear 3D Puzzle

Object: Assemble the wooden pieces to make a self-propelled locomotive. The ROKR Locomotive Wooden Mechanical Gears is an extremely well designed model set with very tight tolerances and good machining. The interlocking mechanisms are pretty intuitive and not overly tight. Assemble without glue and chemicals on details that are already cut and ready to piece together. There is no batteries required; it is simply powered by spring.Ages: 14+349 Pieces.Finished size: 37 cm x 12 cm x 18.5 cmApproximate assembly time: 8 hoursProduct Detail: Plywood (7 pre-cut wood sheets) Inner machine (Wind-up spring) Accessories Fantastic Puzzle